Results 21 to 30 of about 44,954 (307)

Effects of accretion flow on the chemical structure in the inner regions of protoplanetary disks [PDF]

, 2008
We have studied the dependence of the profiles of molecular abundances and line emission on the accretion flow in the hot ($\ga 100$K) inner region of protoplanetary disks. The gas-phase reactions initiated by evaporation of the ice mantle on dust grains
Aikawa, Aikawa, Aikawa, Aikawa, Aikawa, Bockelee-Morvan, Boogert, Carr, Caselli, Collings, D'Alessio, Dullemond, Dutrey, Dutrey, Garmire, Garrod, Gibb, Gibb, Glassgold, H. Nomura, Hogerheijde, Kominami, Lahuis, Macdonald, Markwick, Mathis, Nakagawa, Nomura, Nomura, Nomura, Nomura, Ohishi, Pavlychenkov, Qi, Rodgers, Sandford, Sano, Schöier, Schöier, Semenov, T. J. Millar, Thi, Wakalem, Watanabe, Willacy, Willacy, Willacy, Woodall, Y. Aikawa, Y. Nakagawa   +49 more
core   +2 more sources

The Formation of Uranus and Neptune in Solid-Rich Feeding Zones: Connecting Chemistry and Dynamics [PDF]

, 2009
The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-Saturnian solar nebula are so long that core growth can take > 15 Myr, and (2) the onset of
Alexander, Alibert, Bauer, Bodenheimer, Colwell, Currie, Dodson-Robinson, Dodson-Robinson, Dodson-Robinson, Encrenaz, Fernandez, Goldreich, Goldreich, Gomes, Guillot, Haisch, Henyey, Hicks, Hubickyj, Ida, Johansen, Kary, Levison, Levison, Lin, Marley, Mizuno, Morbidelli, Papaloizou, Papaloizou, Peter Bodenheimer, Podolak, Podolak, Podolak, Pollack, Rafikov, Sarah E. Dodson-Robinson, Stern, Thommes, Thommes, Tsiganis, Youdin   +41 more
core   +1 more source

Numerical study of ice accretion inside an inertial particle separator

AIP Advances, 2022
The inertial particle separator (IPS) installed before a helicopter engine runs the risk of ice accretion. This paper describes a numerical study of ice accretion inside an IPS.
Changbo Qiu, Ningli Chen, Yaping Hu, Biao Wang, Songjun Hu   +4 more
doaj   +1 more source

Separating gas-giant and ice-giant planets by halting pebble accretion [PDF]

, 2014
In the Solar System giant planets come in two flavours: 'gas giants' (Jupiter and Saturn) with massive gas envelopes and 'ice giants' (Uranus and Neptune) with much thinner envelopes around their cores.
Johansen, Anders, Lambrechts, Michiel, Morbidelli, Alessandro   +2 more
core   +1 more source

Ice Accretions on Structures [PDF]

Journal of Glaciology, 1977
AbstractThree basic areas of ice accretion are discussed: (i) the motion of the (supercooled) droplets in air up to collision with the icing object, (ii) the net growth rates, and (iii) the heat balance of an icing cylinder. The weakness of presently used approaches to establish collision efficiency and possible improvements are outlined.
openaire   +1 more source

Sensitivity Study of Ice Accretion Simulation to Roughness Thermal Correction Model

Aerospace, 2021
The effects of atmospheric icing can be anticipated by Computational Fluid Dynamics (CFD). Past studies show that the convective heat transfer influences the ice accretion and is itself a function of surface roughness.
Kevin Ignatowicz, François Morency, Héloïse Beaugendre   +2 more
doaj   +1 more source

Numerical Research of an Ice Accretion Delay Method by the Bio-Inspired Leading Edge

Aerospace, 2022
The accumulation of ice on aircraft is a typical meteorological issue. The ice accretion on the wing’s leading edge can cause an earlier stall and significantly increase the safety risks.
Xiaogang Xu, Tianbo Wang, Yifan Fu, Yang Zhang, Gang Chen   +4 more
doaj   +1 more source

Single Column Model Simulations of Icing Conditions in Northern Sweden: Sensitivity to Surface Model Land Use Representation

Energies, 2020
In-cloud ice mass accretion on wind turbines is a common challenge that is faced by energy companies operating in cold climates. On-shore wind farms in Scandinavia are often located in regions near patches of forest, the heterogeneity length scales of ...
Erik Janzon, Heiner Körnich, Johan Arnqvist, Anna Rutgersson   +3 more
doaj   +1 more source

Ice Accretion on Rotary-Wing Unmanned Aerial Vehicles—A Review Study

Aerospace, 2023
Ice accretion on rotary-wing unmanned aerial vehicles (RWUAVs) needs to be studied separately from the fixed-wing UAVs because of the additional flow complexities induced by the propeller rotation.
Manaf Muhammed, Muhammad Shakeel Virk
doaj   +1 more source

A New Ice Accretion Model for Aircraft Icing Based on Phase-Field Method

Applied Sciences, 2021
Aircraft icing presents a serious threat to the aerodynamic performance and safety of aircraft. The numerical simulation method for the accurate prediction of icing shape is an important method to evaluate icing hazards and develop aircraft icing ...
Hao Dai, Chunling Zhu, Huanyu Zhao, Senyun Liu   +3 more
doaj   +1 more source